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Quality Inspection Equipment:
Surface roughness tester, inside diameter 3-point micrometer, dynamical balancing machine, film thickness
gauge and hardness tester.

Keyroll's Quality Control Includes:
Incoming Material Inspection:
Before material enters our warehouse, we conduct rigorous inspections.
on incoming material, checking for accurate size, hardness and geometric accuracy.
ON-Process Inspection :
To ensure the high quality of our produces, we follow rigorous inspection standards at each
step throughout the entire manufacturing process.
Pre-Shipment inspection:
Before each product is shipped to our customer, a final quality inspection is also conducted to ensure
conducted to ensure the finished product fully meets requirements.